/*
 * RHQ WebSphere Plug-in
 * Copyright (C) 2012 Crossroads Bank for Social Security
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2, as
 * published by the Free Software Foundation, and/or the GNU Lesser
 * General Public License, version 2.1, also as published by the Free
 * Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License and the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU General Public License
 * and the GNU Lesser General Public License along with this program;
 * if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */
package be.fgov.kszbcss.rhq.websphere.connector;

import java.util.concurrent.locks.ReentrantReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock.ReadLock;
import java.util.concurrent.locks.ReentrantReadWriteLock.WriteLock;

public class AdminClientStatsCollector {
    public static final AdminClientStatsCollector INSTANCE = new AdminClientStatsCollector();
    
    private final ReentrantReadWriteLock statsLock = new ReentrantReadWriteLock();
    private AdminClientStats stats = new AdminClientStats();
    
    private AdminClientStatsCollector() {}
    
    public void addData(String destination, long nanos) {
        ReadLock readLock = statsLock.readLock();
        readLock.lock();
        try {
            stats.addData(destination, nanos);
        } finally {
            readLock.unlock();
        }
    }
    
    public AdminClientStats rotateStats() {
        WriteLock writeLock = statsLock.writeLock();
        writeLock.lock();
        try {
            AdminClientStats result = stats;
            stats = new AdminClientStats();
            result.end();
            return result;
        } finally {
            writeLock.unlock();
        }
    }
}
